Malicious PDF — malware analysis report

Static analysis result for SHA-256 1056268449e84cfd…

MALICIOUS

PDF

69.0 KB Created: 2021-02-14 16:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5ce7574fe84372638065af50a4d675ef SHA-1: 21e495f480ffd4af64ef295efeb1463f068961f9 SHA-256: 1056268449e84cfd7ce12b9d06ff5a70451f9d37c415b3388ad950222c75e224
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/aws?utm_term=square+numbers+worksheet+5th+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_6025f8ad2861c.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/6fa71831cc8d8.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/ZCjcmii/cat_simulator_2015_black_panther.pdfIn PDF document text
    • http://lazadacostumercenter.com/finedqjg6i.pdfIn PDF document text
    • http://prodit.space/cv_format_for_job_filepkhal.pdfIn PDF document text
    • http://rodsfish.club/81515008543lte4i.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/hegcSkf/64233703944.pdfIn PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/1559999.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/iaha9u9/rowegotopuba.pdfIn PDF document text
    • http://paypallsecurity.com/5141170074uf1uh.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/die8fMe/videos_de_plants_vs_zombies_garden_war_2.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/90ddced6e6c6e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_6023767ed3772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xojafemori/xadedudinegizokovabitib.pdfIn PDF document text
    • http://paguvano.epizy.com/89454438863.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/revestimento_eliane_forma_branco_acetinado_335x45.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/ccna_data_center_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/audience_analysis_worksheet_example.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/88119144441.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD092 5856 bytes
SHA-256: 7899f4261b18b94b25f81ee107b7a784f7c0a60852ba988dd5edba218748122f
font_01_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 10256 bytes
SHA-256: 14f8afd5eedf70d7a3df92ffcc9329f8dbda31f038e124db2c3026f319eb598b

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